AMD XC4008E-3PC84I

Overview

XC4008E-3PC84I from Xilinx is a Field-Programmable Gate Array (FPGA) with 8,000 usable gates, 84-pin plastic leaded chip carrier (PLCC) package, -3 speed grade (12.5 ns logic delay), and industrial temperature range (-40°C to +100°C). It implements synchronous digital logic in embedded control and interface bridging applications.

For engineers reviewing the XC4008E-3PC84I datasheet, pinout, applications, or equivalent options, key selection criteria include gate count, I/O count (69 user I/Os), speed grade timing, PLCC-84 mechanical compatibility, and Xilinx 4000E family configuration architecture.

Technical Context

The XC4008E-3PC84I uses Xilinx's second-generation FPGA architecture with configurable logic blocks (CLBs), input/output blocks (IOBs), and programmable interconnect matrix. It supports SRAM-based configuration via serial or parallel mode and requires external PROM for power-up loading.

It implements synchronous sequential logic using edge-triggered flip-flops within CLBs and supports registered outputs, three-state control per I/O pin, and global clock routing with low skew. Configuration data is volatile and must be reloaded at power-on.

Key Specifications

Pinout & Package

XC4008E-3PC84I is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, 25.4 mm × 25.4 mm body size, and 1.27 mm lead pitch. Pin numbering follows standard PLCC clockwise sequence starting from the index corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based logic implementation applications.

Compared with XC4008E-3PC84I, the XC4008E-4PC84I trades speed for margin and power efficiency, while the XC4010E-3PC84I provides headroom for gate-intensive functions without changing PCB layout or I/O assignment.

Availability

XC4008E-3PC84I is available at Aetrix Electronics and suitable for industrial motion control, legacy bus bridging, avionics data acquisition, and medical imaging signal preprocessing requiring stable component supply and long-term lifecycle support.

Supply support for XC4008E-3PC84I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Xilinx, now part of AMD, pioneered commercial FPGA technology and delivers programmable logic solutions for aerospace, industrial, and communications markets.

The XC4000E family was designed for cost-sensitive, high-reliability embedded systems requiring reconfigurable logic with predictable timing and industrial temperature operation.

FAQ

What is the maximum operating frequency supported by the XC4008E-3PC84I?

The XC4008E-3PC84I has a -3 speed grade specifying a 12.5 ns CLB propagation delay. This supports maximum system clock frequencies up to approximately 80 MHz for register-to-register paths under typical conditions. Actual achievable frequency depends on design placement, routing, and I/O timing constraints. The XC4008E-3PC84I datasheet provides detailed timing parameters for specific logic configurations.

Does the XC4008E-3PC84I require external configuration memory?

Yes, the XC4008E-3PC84I uses volatile SRAM configuration cells and requires external nonvolatile memory (e.g., Xilinx XC1700-series PROM) to store the bitstream. During power-up, the XC4008E-3PC84I loads configuration data either serially via DIN/CCLK or in parallel mode. Without external PROM, the XC4008E-3PC84I remains unconfigured and nonfunctional.

Can the XC4008E-3PC84I operate at 3.3 V?

No, the XC4008E-3PC84I is a 5 V-only device. Its core logic (VCC) and I/O (VCCO) require 5.0 V ± 5%. Applying 3.3 V will result in improper operation or failure to configure. The XC4008E-3PC84I does not support mixed-voltage I/O or 3.3 V tolerant inputs. Use only 5 V compliant peripherals with the XC4008E-3PC84I.

How many dedicated clock pins does the XC4008E-3PC84I have?

The XC4008E-3PC84I does not have dedicated clock input pins. Instead, it uses general-purpose I/O pins configured as global clock resources through software-defined routing. Up to four global clock nets can be driven from any user I/O pin assigned as a clock source in the design. This flexibility is documented in the XC4008E-3PC84I pinout and architecture manual.

Is the XC4008E-3PC84I still in production?

The XC4008E-3PC84I is obsolete per Xilinx's product discontinuance notice, but Aetrix Electronics maintains legacy inventory and offers traceable, tested units for ongoing production and repair. Lifecycle support includes obsolescence monitoring, cross-reference assistance, and last-time-buy planning for the XC4008E-3PC84I.